I tried it only a few times and didn't notice any clear effects. So as far as I can tell, no, it doesn't work for me.
Have you tested this intervention on yourself more systematically?
I'm currently trying it out on a loose alternating-day basis; if it seems to be working, I may upgrade to blinding & randomization.
EDIT: it does correlate with earlier wake up, so I've upgraded to randomization; the blinding didn't work out because the caffeine pills have too detectible a flavor.
Thus spake Eliezer:
It seems that many here might have outlandish ideas for ways of improving our lives. For instance, a recent post advocated installing really bright lights as a way to boost alertness and productivity. We should not adopt such hacks into our dogma until we're pretty sure they work; however, one way of knowing whether a crazy idea works is to try implementing it, and you may have more ideas than you're planning to implement.
So: please post all such lifehack ideas! Even if you haven't tried them, even if they seem unlikely to work. Post them separately, unless some other way would be more appropriate. If you've tried some idea and it hasn't worked, it would be useful to post that too.